- tests/fsi2_b4_added_mass.rs: #[ignore] instrument fsi2_b4_prescribed_mode. The flag's wetted
surface moves as q(t) phi (phi from B4_MODE, M-orthonormal in-vacuo b4), q = q0 r(t) sin(w t);
per step the CSV records q, qd, qdd and the generalised fluid force sum_k f_k . phi_k from the
march's own nodal load (sample_load); optional per-node load CSV. B4_DT overrides the fluid step.
- fsi2_harness/overset.rs: RTX_FSI2O_STILL=1 turns the inflow off (still fluid) while keeping
u_mean for the CFL step and the solvers' reference flux. Unset = unchanged; gate: a short
prescribed replay (fsi2_overset_prescribed_motion, ny 62, 185 steps) byte-identical to main.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
